The best cue is to keep your shoulder blades back and down. The first few reps show the incorrect position. In the last few reps, the shoulder are back and down.
For any horizontal pulling exercise, like seated cable rows, keeping the shoulders back and down will ensure your lats and mid back are being hit the hardest, instead of just the upper traps and biceps.
In the video, the first couple of reps are performed incorrectly and the last couple of reps are performed with the shoulders back and down.
We don't throw around the term "living legend" much around here because not many people deserve such accolades. But T-Nation recently sat down with a man who just might fit the bill: Dave Draper.
Yes, this is super weird. But it nails the transverse abdominis (the deep core muscle that's like a natural weight belt) and even the internal obliques.